No -- it describes the set-up wherein the agent receives 15,000 baht but the complicit immigration officer can say 'I only received 1900 baht as in this here receipt to the expat.'
BTW: Thai Criminal Code 1956 (ประเทศไทยทางอาญา พ.ศ. รหัส 2499)
Section 144. Granting of Benefit by Official
Whoever, giving, offering or agreeing to give the property or any other benefit to the official, member of State Legislative Assembly, member of Provincial Assembly or member of Municipal Assembly so as to induce such person to do or not to do any act, or to delay the doing of any act contrary to one's own duty, shall be imprisoned not out of five years or fined not out of ten thousand Baht, or both.